Chapter 2 Cell Growth and Reproduction

Name: ______Block: ______

Chapter 2 Cell Growth and Reproduction

2.1 – 2.6 Quiz #2

Modified True/False: change the identified word or phrase to make the statement true.

____ 1. Cuts and scrapes heal because damaged cells are replaced by cell division. ______

____ 2. Chromosomes are made of two chemicals known as protein and DNA. ______

____ 3. Most of the cell’s activities take place in the nucleus. ______

____ 4. A gene is a molecule of DNA that codes for a protein. ______

____ 5. During mitosis, the sister chromatids separate and move to opposite poles of the cell during metaphase. ______

____ 6. Proteins are complex molecules that are assembled from smaller molecules known as RNA. ______

Multiple Choice Identify the choice that best completes the statement or answers the question.

____ 7. Under ideal conditions, bacteria can double their numbers every 20 minutes. This increase in population is due to

a. / Mitosis b. regeneration c. meiosis d. interphase

____ 8. Which of the following is found within the cytoplasm of a cell?

a. / chromosomes b. nucleolus c. mitochondria d. none of the above

____ 9. DNA may be the only molecule

a. / containing sugar
b. / found in cells
c. / able to make copies of itself
d. / found only in the nuclei of cells

____ 10. The stages of mitosis, in the order that they take place, are

a. / anaphase, metaphase, prophase, telophase
b. / prophase, anaphase, metaphase, telophase
c. / prophase, metaphase, anaphase, telophase
d. / prophase, telophase, metaphase, anaphase

____ 11. The process that divides the cytoplasm of the daughter cells at the end of cell division is known as

a. / Telekinesis b. cytokinesis c. telophase d. cell plate

____ 12. As mitosis ends, chromosomes disappear and nuclear membranes form in the new daughter cells. These cells are in

a. / Interphase b. Prophase c. telophase d. cytokinesis

____ 13. In which phase of mitosis do sister chromatids become visible?

a. / Prophase b. metaphase c. anaphase d. telophase

____ 14. Normally, what human cells do not perform mitosis?

a. / red blood cells
b. / skin cells
c. / cells lining the digestive tract
d. / all human cells can perform mitosis

____ 15. A random change in any of the genes in a cell is known as

a. / a mutation b. a carcinogen c. a genetic disease d. a tumour

____ 16. Cancer cells can be identified because they

a. / have larger nuclei than non-cancerous cells
b. / can not divide when separated from each other
c. / always spread to other areas of the body
d. / both A and B

____ 17. Which of the following is true about radiation?

a. / Radiation can cause cancer by causing mutations.
b. / Radiation can cure cancer by killing cells.
c. / Radiation can kill healthy cells.
d. / All of the above are true.

____ 18. What type(s) of mutation can cause cancer?

a. / all mutations
b. / inherited mutations
c. / harmful mutations
d. / only mutations caused by chemicals

____ 19. Bacteria can double their numbers rapidly under ideal conditions using

a. / binary fission b. budding c. vegetative reproduction d. spores

____ 20. If cytokinesis splits the daughter cells into two cells of unequal size, what method of reproduction has taken place?

a. / Sexual b. binary fission c. budding d. cloning

____ 21. If you look at the underside of a mushroom you will find tiny spores hidden inside the gills. These spores

a. / all have the same DNA
b. / are the seeds of the mushroom
c. / are the mushroom’s form of sexual reproduction
d. / are the zygotes of a mushroom

Completion Complete each statement.

22. DNA is described as looking like a twisted ladder. If a rung of this ladder contains adenine, the molecule opposite it on the same rung of the ladder will be ______.

23. You observe a living cell using a microscope and find that the cell is growing, taking in food, and excreting wastes. The cell is in the stage of the cell cycle known as ______.

24. People are beginning to realize the dangers of second-hand cigarette smoke because of cancer reported in non-smokers who work or live with smokers. Scientists have found that all cigarette smoke contains chemicals that can best be classified as ______.

25. If a common earthworm is cut in half, the anterior (front end) will grow a new posterior (rear end), but the posterior will not grow a new anterior. This tells us that the earthworm is capable of ______but not reproduction by ______.

26. If you left a sandwich in your locker over the weekend, by Monday, the bread would be covered with a fuzzy, black material that, if touched, would release a cloud of small particles. If these particles fell on another sandwich, they would grow into new bread mould, genetically identical to the parent organism. The cloud of tiny black particles is probably made up of ______.

Ch. 2

Answer Section

MODIFIED TRUE/FALSE

1. ANS: T PTS: 1 REF: K

OBJ: 2.1 LOC: Unit A - PLB1 TOP: Unit A - Ch. 02 KI1

2. ANS: T PTS: 1 REF: K

OBJ: 2.2 LOC: Unit A - PLB1 TOP: Unit A - Ch. 02 KI2

3. ANS: F, cytoplasm

PTS: 1 REF: K OBJ: 2.2 LOC: Unit A - PLB1

TOP: Unit A - Ch. 02 KI2

4. ANS: T PTS: 1 REF: K

OBJ: 2.3 LOC: Unit A - PLB1 TOP: Unit A - Ch. 02 KI2

5. ANS: F, anaphase

PTS: 1 REF: K OBJ: 2.4 LOC: Unit A - PLB1

TOP: Unit A - Ch. 02 KI3

6. ANS: F, amino acids

PTS: 1 REF: K OBJ: 2.3 LOC: Unit A - PLB1

TOP: Unit A - Ch. 02 KI2

MULTIPLE CHOICE

7. ANS: A PTS: 1 REF: K OBJ: 2.1

LOC: Unit A - PLB1 TOP: Unit A - Ch. 02 KI1

8. ANS: C PTS: 1 REF: K OBJ: 2.2

LOC: Unit A - PLB1 TOP: Unit A - Ch. 02 KI2

9. ANS: C PTS: 1 REF: K OBJ: 2.3

LOC: Unit A - PLB1 TOP: Unit A - Ch. 02 KI2

10. ANS: C PTS: 1 REF: K OBJ: 2.4